From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2008-04-15T20:19:23+09:00
Subject: Re: How to duplicate a object changing the class without attributes memory copy

On Tue, Apr 15, 2008 at 10:26 AM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> 2008/4/15, Gennady Bystritsky <Gennady.Bystritsky@quest.com>:
>
> > Not true. To verify it, after you do "from.name = header.name", try this:
>  >
>  >  puts header.name.object_id
>  >  puts from.name.object_id
>  >
>  >  You will see same object id, meaning that you have a reference, not a new object.
>
>  Ohh, that's annoying for me!
>  You are right, both are the same objects **until** I modify one of them. I mean:

This sentence is confusing: you don't modify one of them, you assign
the variable
a different object:

a = "header"
b = a

a --------> "header"
                       ^
                        |
                        |
                        b


b = "new header"

a --------> "header"
b --------> "new header"

The object previously referenced by both a and b has not been modified.
When you assigned a new string to b, then b referenced a different object.

Jesus.